Boot for a pneumatic brake booster



FIG. 1 is a front elevation view of a boot for a pneumatic brake booster showing my new design;

FIG. 2 is a left side elevation view of FIG. 1;

FIG. 3 is a rear elevation view of FIG. 1; and,

FIG. 4 is a rear perspective view of FIG. 3. 

The ornamental design for a boot for a pneumatic brake booster, as shown and described. 